feat: add json-to-schema command-line feature

bin/cli.js

@@ -3,6 +3,7 @@
 const validate = require('./validate')
 const toJSON = require('./to-json')
 const toSchema = require('./to-schema')
+const jsonToSchema = require('./json-to-schema')
 
 const toOpts = {
   tabs: {
@@ -23,6 +24,9 @@ const yargs = require('yargs')
   .command('to-schema',
     'Accepts .ipldsch and .md files, if none are passed will read from stdin, prints the canonical IPLD Schema form of the schema',
     toOpts)
+  .command('json-to-schema',
+    'Accepts .json files, if none are passed will read from stdin, prints the canonical IPLD Schema form of the schema represented by the JSON',
+    toOpts)
   .showHelpOnFail(true)
   .demandCommand(1, 'must provide a valid command')
   .help()
@@ -45,6 +49,9 @@ switch (yargs.argv._[0]) {
   case 'to-schema':
     runCommand(toSchema)
     break
+  case 'json-to-schema':
+    runCommand(jsonToSchema)
+    break
   default:
     yargs.showHelp()
 }

bin/json-to-schema.js

@@ -0,0 +1,21 @@
+#!/usr/bin/env node
+
+const print = require('../print')
+const collectInput = require('./collect-input')
+
+let indent = '  '
+
+async function toSchema (files, options) {
+  if (options.tabs) {
+    indent = '\t'
+  }
+
+  const input = await collectInput(files)
+
+  for (const { contents } of input) {
+    const schema = JSON.parse(contents)
+    console.log(print(schema, indent))
+  }
+}
+
+module.exports = toSchema